Motor-cycle.



W. G. JOHNSON:

MOTOR GYGLE.

APPLICATION FILED JULY 16, 1907.

Patented Sept. 15, 1908.

WI T/VESSZ'S WA'LTER CLAUDE JOHNSON, or COLEMANS' HATCH, ENGLAND.

MOTOR-CYCLE.

Specification of Letters Patent.

Patented Sept. 15, 1908.

Application filed. July 16, 1907. Serial No. 384,078.

To all whom it may concern:

Be it known thatv I, WALTER CLAUDE JOHNSON, subject of the King .of Great Britain, residing at Broadsto'ne Farm, Colemans Hatch, in the county of Sussex, England, have invented new and useful Im rovements in Motor-Cycles, of which the following is a specification. Y I

This invention relates to a motor-driven cycle of the type described in my Patent No. 846212, adistinctive feature of which type consists in the facility it affords for mounting and dismounting due to the provision of a platform on which the rider is conveyed in a standing position, the latform being raised only a little above t 1e road surface and placed well to the rear so that, by making a Y At each end of the counter-shaftd is car-' ried a small chain-wheel e e arranged to be small step down backwards, the rider will be clear of the machine In my previous patent abovequoted, the safety due to the facility for dismounting was supplemented by a measure of stability,

derived fronrthe employmentof twin-treads on the rear-wheel, on each side of which a platform was provided, the rider being required to staru astride the. rear wheel.

The present invention 1s dlstlngulshed from the former in an enlargement of the element of stability by the employment of two independently constructed wheels in sub stitution for. thesingle twin-tread rear-wheel and by their being placed sufficiently apart to give enough width for a platform between them for the accommodation of the standing suitable for use-by ladies.

rider. The avoidance of an uprising wheel casebetween the feet will, in a wheelbase render the machine especially On the accompanying drawing is shown a tri-cycle constructed in accordance foregoing description.

In this draw1ng:Figure 1 is an elevation showin"' arider standing erect on the low situate platform between the two "rear- Wheels. Rig. 2 is a plan of the .machine without the rider, and :Fig. 3 is a rear view of a portion.

ported at a small height above the ground by fcured axles'on wheels n In these figures a is a platform on which the rider stands, this platform being supa dropiframe b to which frame are also sewhich run the two driving ditionto the increasedstability, due to widening the rear 7 with the 'b is the tube framing connected to the drop frame and carrying the single steering front wheel-2 and the motor 3; 4 is'the steering fork connected with the wheel 2. As will .be seen, the rear wheels are of smaller diame- Any one of the ordinary constructions of differential driving gear may be adopted whereby both wheels will be simultaneously urged each at the appropriate speed for. running on a straight or curved path but, for the present pupose, a more simp e method of driving may wl advantage be employed as follows free to run faster than the shaft but to be so clutch-driven as to preclude a slower rotation than the shaft, after the manner and by one of the methods of the ordinary freewheel drive :nployed in bicycles. The chain-wheels e'", e are by chains f 2 connected respectively to chain wheels g g which are secured respectively to the driving wheels 0 c.

as on a straight path then both willbe driven but on a deviated path the wheel which runs along the curve'of larger radius will have to rotate faster than the other to effect the required angular deviation. This it will be able to do by virtue of the free wheel clutch device and for the time the duty of driving the machine willbe concentrated on the wheel which runs on the curve of smaller radius. The tendency to side-slip which appears to be greatly promoted byithe, diiferential driving gear will, under these'circuinstances, be diminthe machine. On account of the erect attitude of the rider he will be able by a slight adjustment 'f his body to concentrate as much Weight on either wheel as will most efficiently propel the machine. H

I claim; A motor cycle having a single wheel in front and a pair of Wheels in rear of smaller front wheel to the rear wheels, a steering fork connected with thefront wheel, a foot plat- If both wheels 0 c rotate with the same angular velocity lot diameter, a drop frame extending from the form carried by the drop frame between the name to this speoific ation in'the presence of rear wheels and on Whioh the operator stands, two subscribing Witnesses.

and a motor carried by the drop frame in front of the foot platform with connections TER CLAUDE JOHNSON 5 tothe rear Wheels to drive the some, sub- Witnesses: stantially as described. F. W. LANE,

. In testimony whereof I have signed my H. D. JAMISON. 

